| A | B |
|---|
| friction ( definiton) | a force that opposes motion between two surfaces that are touching. |
| rolling friction ( definiton + example) | a force that slows down things with wheels. The friction between car tires and the road |
| sliding friction ( defintion and example) | a force that slows down things that are touching directly. A book sliding across the floor |
| fluid friction ( defintion + example) | a force that slows down objects when a liquid or a gas is involved. When you slide across a wet floor it is fluid friction because of the water |
| static friction ( defintion + examples) | a force that keeps object form moving at all. When you push on a heavy box and it does not move at all. |
| Positive accleration | the type of accelration that happens when a object speeds up. The math problem resutls in a positive answer and the line on a graph will go up |
| Negative accleration | the type of accelration that happens when an object slows down. The math problem will result in a negative number and the the line on a graph will go down |
| motion | an object's change in postion through time when compared to a reference point. |
| lubricants | a substance applied to surfaces to reduce the friction between them. Usually a liquid because fluid friction is the lowest resistance. Examples include motor oil, water, and grease |
| average | The middle. Add the numbers together and divide by the number of numbers. |
| continuous | to keep going in the same way |
